Oh sorry but this isnt english so i cant help with this u shouldnt have clicked history
Answer:
We don't need to worry- is it a simple sentence?*******
Explanation:
1. C because of the sensory details, Plunging and gloom.
2. A the calmness of the sea...
B.)
The 2 sentences should be turned into one because if the last sentence is left like that, it would be called a fragment/incomplete sent.